In the period between Sep 9 and Sep 22, 2021 SGR J1935+2154 entered a new stage of burst/flaring activity, detected with several satellites (GECAM, [1]}; Konus-Wind, [2]}; Fermi, [3]}; AGILE, [4]}). We then decided to target the source with our fast photon counter Iqueye [5]}, which is fiber-fed at the 1.22 m Galileo telescope at the Asiago Astrophysical Observatory through the Iqueye Fiber Interfacehttps://web.oapd.inaf.it/zampieri/aqueye-iqueye/ (IFI; [6]}). Our main goal was exploiting the exquisite time resolution (up to ns) and high sensitivity of our instrumentation to search for second or sub-second optical flashes possibly associated to X-ray and/or radio bursts from SGR J1935+2154.
